Well, I thought of making curation pay more as you curate more authors, and particularly new authors, but I haven't the chops to determine whether there is ever a 'price point' at which circle jerking is less emunerative under such a scheme - that won't break folks that upvote their friends too.
The solution I have come up with that will work NOBODY likes, or will like.
VP weighted by rep instead of SP.
It just ends the problem by removing the cause, which is that voting is a means of producing ROI, instead of supporting good content and driving an exceptional social media platform.